Diogenes, the Dog

Defender, Ward - Sacrifice 3 nonbasic land permenents.

At the beginning of your unkeep, if you have at
least 20 life more than your starting life total, you
win the game. Otherwise, you sacifice 3 nonbasic
land permanents other than Diogenes, the Dog.

Whenever an opponent casts a spell, you gain 1 life
for every nonbasic land permenent that
player controls.